Fig. 1
From: Novel role of focused airway ultrasound in early airway assessment of suspected laryngeal trauma
a Surface landmark of probe position (in longitudinal view) in relation to scanning the area for b and c. b Normal sonoanatomy of upper airway showing the relationship between thyroid cartilage, cricoid cartilage, air–mucosal interface and surrounding soft tissues. A continuous and undisrupted line of air–mucosal interface seen as hyperechoic line (arrowhead) c Airway ultrasound showed disruption air–mucosal interface without obvious detectable laryngeal fracture (circle). SM: sternocleidomastoid muscle; TC: thyroid cartilage; CC: cricoid cartilage